- Patient is taking corticosteroids for up to 4 weeks before signing informed consent and during screening, disease-modifying drugs including methotrexate, sulfasalazin and cyclosporin for up to 4 weeks before signing informed consent, leflunomide, cyclophosphamide for up to 6 months before signing informed consent, phototherapy including selective phototherapy and photochemotherapy for up to 4 weeks before signing informed consent, live or attenuated vaccines for up to 8 weeks before signing informed consent.